you guys are not looking at this pic correctly and what happened lol.
on cal-tracs, you put an aluminum bushing in the front spring eye. from Nicks pic, you can see the bush had not been rotating around the bolt but instead, the bolt had been rotating in the spring hanger with the cantilever arm/aluminum bushing/sleeve. eventually the hanger cuts into the bolt and the bolt fails/fall out. For some reason, the bolt froze to the sleeve and/or bush or from what i see, the cantilever arm had been against the hanger and rotating against it.
i didnt see that before on my phone nick but you might want to see if the cantilever arm has free movment when you put a bolt/sleeve back in and torque it down. the sleeve may be shot. Also, tighten your damn jam nut! next to fail is the f-ing threads to pull out of the bar!
these will work on a DD but just like changing your oil/fuel filter/rotating tires, you need to inspect these parts for wear or damage and keep them in good shape